"With Q3 revenue growth of 9% and adjusted EBITDA growth of 28%, both
exceeding our expectations, we are pleased to raise our full year 2018
outlook," commented Phil Heasley, President and CEO, ACI Worldwide.
"Renewal activity was strong and contributed to total bookings growth of
37%. Importantly, we are seeing nearly 100% adoption of our newer UP
solutions. With an exciting pipeline of new business, including notable
Immediate Payments activity, we remain confident regarding our
opportunity."

Q3 2018 FINANCIAL SUMMARY

In Q3, total bookings were up 37% driven by strong growth in renewal
bookings.

In Q3 2018, revenue was $246 million, up $20 million, or 9% from Q3
2017. Net income in the quarter was $15 million, up $12 million from
last year. Adjusted EBITDA was $60 million, up $13 million, or 28% from
Q3 2017.

ACI's On Premise segment revenue was $141 million, up 12% from last
year, and segment adjusted EBITDA margin was 55% versus 52% in Q3 2017.
In Q3 2018, revenue from ACI's On Demand segment was $105 million, up 5%
from last year. On Demand segment net adjusted EBITDA margin was 5%, up
from negative 2% last year. On Demand segment net adjusted EBITDA
margins are adjusted for pass through interchange revenue of $39 million
and $36 million, for Q3 2018 and Q3 2017, respectively.

ACI ended Q3 2018 with a 12-month backlog of $827 million and a 60-month
backlog of $4.2 billion. After adjusting for foreign currency
fluctuations, our 12-month backlog decreased $7 million and our 60-month
backlog decreased $112 million from Q2 2018.

Cash flows from operating activities in Q3 were $29 million, up from
$(14) million in Q3 2017. Adjusted operating free cash flow in Q3 was
$21 million, up from $4 million in Q3 2017. ACI ended Q3 2018 with $76
million in cash on hand, up from $59 million in Q2, and a debt balance
of $689 million. Year-to-date, ACI has repurchased 2.3 million shares
for $54 million, or an average price of $23.21 per share. The company
has $177 million remaining on its share repurchase authorization.

GUIDANCE

The company expects the adoption of ASC 606 to impact the timing and
amount of revenue recognition for its on-premise licensing arrangements.
The company does not expect the adoption of ASC 606 to have a
significant impact on its other revenue streams or cash flows from
operations. The company has provided its full year outlook under both
ASC 606 and ASC 605 in order to provide additional transparency. The
company will continue to provide actual results under both ASC 606 and
ASC 605 throughout 2018.

The company is raising its outlook for the full year 2018 under ASC 606.
The company now expects revenue to be between $1.05 billion and $1.075
billion and adjusted EBITDA to be in a range of $270 million to $285
million, which excludes approximately $7 million in significant
transaction-related expenses.

For the full year 2018 under ASC 605, the company continues to expect
revenue to be between $1.05 billion and $1.075 billion, which represents
3-5% growth over 2017 on a comparable GAAP basis. Adjusted EBITDA is
expected to be in a range of $270 million to $285 million, which
excludes approximately $7 million in significant transaction-related
expenses. We expect full year 2018 new bookings growth to be in the low
double digits. We continue to target 2019 and 2020 adjusted EBITDA to be
in a range of $300 million to $315 million and $335 million to $350
million, respectively.

CONFERENCE CALL TO DISCUSS FINANCIAL RESULTS AND OUTLOOK

Management will host a conference call at 8:30 am ET to discuss these
results as well as 2018 guidance. Interested persons may access a
real-time audio broadcast of the teleconference at http://investor.aciworldwide.com/
or use the following numbers for dial-in participation: US/Canada: (866)
914-7436, international: +1 (817) 385-9117. Please provide your name,
the conference name ACI Worldwide, Inc. and conference code 7793919.
There will be a replay of the call available for two weeks on (855)
859-2056 for US/Canada callers and +1 (404) 537-3406 for international
participants.

ACI, ACI Worldwide, ACI Payment Systems, the ACI logo and all ACI
product names are trademarks or registered trademarks of ACI Worldwide,
Inc., or one of its subsidiaries, in the United States, other countries
or both. Other parties' trademarks referenced are the property of their
respective owners.

To supplement our financial results presented on a GAAP basis, we use
the non-GAAP measures indicated in the tables, which exclude significant
transaction-related expenses, as well as other significant non-cash
expenses such as depreciation, amortization and stock-based
compensation, that we believe are helpful in understanding our past
financial performance and our future results. The presentation of these
non-GAAP financial measures should be considered in addition to our GAAP
results and are not intended to be considered in isolation or as a
substitute for the financial information prepared and presented in
accordance with GAAP. Management generally compensates for limitations
in the use of non-GAAP financial measures by relying on comparable GAAP
financial measures and providing investors with a reconciliation of
non-GAAP financial measures only in addition to and in conjunction with
results presented in accordance with GAAP. We believe that these
non-GAAP financial measures reflect an additional way to view aspects of
our operations that, when viewed with our GAAP results, provide a more
complete understanding of factors and trends affecting our business.
Certain non-GAAP measures include:

Adjusted EBITDA: net income plus income tax expense (benefit), net
interest income (expense), net other income (expense), depreciation,
amortization and stock-based compensation, as well as significant
transaction-related expenses. Adjusted EBITDA should be considered in
addition to, rather than as a substitute for, net income.

Adjusted Diluted EPS: diluted EPS plus amortization of
acquisition-related intangibles and software, stock-based
compensation, as well as significant transaction-related expenses.
Adjusted diluted EPS should be considered in addition to, rather than
as a substitute for, diluted EPS.

ACI is also presenting adjusted operating free cash flow, which is
defined as net cash provided by operating activities and net after-tax
payments associated with significant transaction-related expenses, less
capital expenditures. Adjusted operating free cash flow is considered a
non-GAAP financial measure as defined by SEC Regulation G. We utilize
this non-GAAP financial measure, and believe it is useful to investors,
as an indicator of cash flow available for debt repayment and other
investing activities, such as capital investments and acquisitions. We
utilize adjusted operating free cash flow as a further indicator of
operating performance and for planning investment activities. Adjusted
operating free cash flow should be considered in addition to, rather
than as a substitute for, net cash provided by operating activities. A
limitation of adjusted operating free cash flow is that it does not
represent the total increase or decrease in the cash balance for the
period. This measure also does not exclude mandatory debt service
obligations and, therefore, does not represent the residual cash flow
available for discretionary expenditures. We believe that adjusted
operating free cash flow is useful to investors to provide disclosures
of our operating results on the same basis as that used by our
management.

ACI backlog includes estimates for SaaS and PaaS, license, maintenance,
and services specified in executed contracts but excluded from
contracted revenue that will be recognized in future periods, as well as
revenue from assumed contract renewals to the extent that we believe
recognition of the related revenue will occur within the corresponding
backlog period. We have historically included assumed renewals in
backlog estimates based upon automatic renewal provisions in the
executed contract and our historic experience with customer renewal
rates.

Backlog is considered a non-GAAP financial measure as defined by SEC
Regulation G. Our 60-month backlog estimates are derived using the
following key assumptions:

License arrangements are assumed to renew at the end of their
committed term or under the renewal option stated in the contract at a
rate consistent with historical experience. If the license arrangement
includes extended payment terms, the renewal estimate is adjusted for
the effects of a significant financing component.

Maintenance fees are assumed to exist for the duration of the license
term for those contracts in which the committed maintenance term is
less than the committed license term.

SaaS and PaaS arrangements are assumed to renew at the end of their
committed term at a rate consistent with our historical experiences.

Foreign currency exchange rates are assumed to remain constant over
the 60-month backlog period for those contracts stated in currencies
other than the U.S. dollar.

Our pricing policies and practices are assumed to remain constant over
the 60-month backlog period.

Estimates of future financial results are inherently unreliable. Our
backlog estimates require substantial judgment and are based on a number
of assumptions as described above. These assumptions may turn out to be
inaccurate or wrong, including, but not limited to, reasons outside of
management's control. For example, our customers may attempt to
renegotiate or terminate their contracts for a number of reasons,
including mergers, changes in their financial condition, or general
changes in economic conditions in the customer's industry or geographic
location, or we may experience delays in the development or delivery of
products or services specified in customer contracts which may cause the
actual renewal rates and amounts to differ from historical experiences.
Changes in foreign currency exchange rates may also impact the amount of
revenue actually recognized in future periods. Accordingly, there can be
no assurance that contracts included in backlog estimates will actually
generate the specified revenue or that the actual revenue will be
generated within the corresponding 60-month period.

Backlog estimates should be considered in addition to, rather than as a
substitute for, reported revenue and contracted but not recognized
revenue (including deferred revenue).

Forward-Looking Statements

This press release contains forward-looking statements based on current
expectations that involve a number of risks and uncertainties.
Generally, forward-looking statements do not relate strictly to
historical or current facts and may include words or phrases such as
"believes," "will," "expects," "anticipates," "intends," and words and
phrases of similar impact. The forward-looking statements are made
pursuant to safe harbor provisions of the Private Securities Litigation
Reform Act of 1995.

All of the foregoing forward-looking statements are expressly qualified
by the risk factors discussed in our filings with the Securities and
Exchange Commission. Such factors include, but are not limited to,
increased competition, the success of our Universal Payments strategy,
demand for our products, restrictions and other financial covenants in
our credit facility, consolidations and failures in the financial
services industry, customer reluctance to switch to a new vendor, the
accuracy of management's backlog estimates, the maturity of certain
products, our strategy to migrate customers to our next generation
products, failure to obtain renewals of customer contracts or to obtain
such renewals on favorable terms, delay or cancellation of customer
projects or inaccurate project completion estimates, volatility and
disruption of the capital and credit markets and adverse changes in the
global economy, our existing levels of debt, impairment of our goodwill
or intangible assets, litigation, future acquisitions, strategic
partnerships and investments, the complexity of our products and
services and the risk that they may contain hidden defects or be
subjected to security breaches or viruses, compliance of our products
with applicable legislation, governmental regulations and industry
standards, our ability to protect customer information from security
breaches or attacks, our compliance with privacy regulations, our
ability to adequately defend our intellectual property, exposure to
credit or operating risks arising from certain payment funding methods,
the cyclical nature of our revenue and earnings and the accuracy of
forecasts due to the concentration of revenue-generating activity during
the final weeks of each quarter, business interruptions or failure of
our information technology and communication systems, our offshore
software development activities, risks from operating internationally,
including fluctuations in currency exchange rates, exposure to unknown
tax liabilities, volatility in our stock price, and potential claims
associated with our sale and transition of our CFS assets and
liabilities. For a detailed discussion of these risk factors, parties
that are relying on the forward-looking statements should review our
filings with the Securities and Exchange Commission, including our most
recently filed Annual Report on Form 10-K and our Quarterly Reports on
Form 10-Q.